In mathematics, the deductive method reigns. Without proof, a claim remains unsolved, a mere conjecture, not something that can be simply assumed; when a proof is found, the problem is solved, it turns into a “result,” something that can be relied on. So mathematicians think. But is there more to mathematical justification than proof? -/- The answer is an emphatic yes, as I explain in this article. I argue that non-deductive justification is in fact pervasive in mathematics, and that it (...) is in good epistemic standing. (shrink)

Intuitively, there is a difference between knowledge and mere belief. Contemporary philosophical work on the nature of this difference has focused on scenarios known as “Gettier cases.” Designed as counterexamples to the classical theory that knowledge is justified true belief, these cases feature agents who arrive at true beliefs in ways which seem reasonable or justified, while nevertheless seeming to lack knowledge. Prior empirical investigation of these cases has raised questions about whether lay people generally share philosophers’ intuitions about these (...) cases, or whether lay intuitions vary depending on individual factors (e.g. ethnicity) or factors related to specific types of Gettier cases (e.g. cases that include apparent evidence). We report an experiment on lay attributions of knowledge and justification for a wide range of Gettier Cases and for a related class of controversial cases known as Skeptical Pressure cases, which are also thought by philosophers to elicit intuitive denials of knowledge. Although participants rated true beliefs in Gettier and Skeptical Pressure cases as being justified, they were significantly less likely to attribute knowledge for these cases than for matched true belief cases. This pattern of response was consistent across different variations of Gettier cases and did not vary by ethnicity or gender, although attributions of justification were found to be positively related to measures of empathy. These findings therefore suggest that across demographic groups, laypeople share similar epistemic concepts with philosophers, recognizing a difference between knowledge and justified true belief. (shrink)

In this article, we discuss critically some of the key themes in Max Deutsch’s excellent book, The Myth of the Intuitive. We focus in particular on the shortcomings of his historical analysis – a missed opportunity by our lights, on the claim that philosophers present arguments in support of the judgments elicited by thought experiments, and on the claim that experimental philosophy is only relevant for the methodology of philosophy if thought experiments elicit intuitions.

This paper argues that a necessary condition on inferential knowledge is that one knows all the propositions that knowledge depends on. That is, I will argue in support of a principle I call the Knowledge from Knowledge principle: (KFK) S knows that p via inference or reasoning only if S knows all the propositions on which p depends. KFK meshes well with the natural idea that (at least with respect to deductively valid or induc- tively strong arguments) the epistemic status (...) of one’s belief in the conclusion of an argument is a function of the epistemic status of the attitudes one has to the premises of that argument. One gets what one puts in: S’s belief in the conclusion C of an argument A has epistemic status E for S only if S’s belief in each of the premises C depends on also has epistemic status E.1 This is compatible, of course, with the epistemic status of S’s conclusion being greater than the epistemic status of the premises on which the conclusion of her reasoning depends. Furthermore, even though KFK applies more straightforwardly to non-suppositional inferences, we can also plausibly apply the principle to sup- positional reasoning if we treat S’s assuming for the sake of argument that p,2 as S assuming for the sake of argument that she knows that p.3 Although extremely plausible, philosophers have failed to present a concerted case in support of KFK. Most of their energy goes to articulating and/or defending some form of closure principle for knowledge.4 What is more, recently versions of this principle have been dismissed as problematic but I think without the reasons in its support been fully appreciated. This paper is an e fort to change the current state of affairs. Its focus is positive, however: my goal is to make the best case I can in support of KFK.5 To that end, the paper presents the reasons we have to accept KFK (§1), consid- ers an objection to the principle (§2), and situates the principle in the broader normative context of knowledge norms (§3). (shrink)

In recent work, Stalnaker proposes a logical framework in which belief is realized as a weakened form of knowledge. Building on Stalnaker’s core insights, we employ topological tools to refine and, we argue, improve on this analysis. The structure of topological subset spaces allows for a natural distinction between what is known and what is knowable; we argue that the foundational axioms of Stalnaker’s system rely intuitively on both of these notions. More precisely, we argue that the plausibility of the (...) principles Stalnaker proposes relating knowledge and belief relies on a subtle equivocation between an “evidence-in-hand” conception of knowledge and a weaker “evidence-out-there” notion of what could come to be known. Our analysis leads to a trimodal logic of knowledge, knowability, and belief interpreted in topological subset spaces in which belief is definable in terms of knowledge and knowability. We provide a sound and complete axiomatization for this logic as well as its uni-modal belief fragment. We then consider weaker logics that preserve suitable translations of Stalnaker’s postulates, yet do not allow for any reduction of belief. We propose novel topological semantics for these irreducible notions of belief, generalizing our previous semantics, and provide sound and complete axiomatizations for the corresponding logics. (shrink)

The so–called truthmaker solution to the problem Gettier is thought to have posed for the analysis of knowledge as justified true belief is to add a fourth condition, requiring that one’s evidence for one’s belief be the state of affairs that makes the belief true. Adrian Heathcote argues that the reason why one lacks knowledge in Russell’s case of the stopped clock is that, as in the classic Gettier–style cases, this condition is not satisfied. I argue that the proposed solution (...) fails, as it embodies a misunderstanding of what evidence is. (shrink)

This paper argues that Sosa’s virtue perspectivism fails to combine satisfactorily internalist and externalist features in a single theory. Internalism and externalism are reconciled at the price of creating a Gettier problem at the level of “reflective” or second-order knowledge. The general lesson to be learned from the critique of virtue perspectivism is that internalism and externalism cannot be combined by bifurcating justification and knowledge into an object-level and a meta-level and assigning externalism and internalism to different levels.

The paper makes two points. First, any theory of knowledge must explain the difference between cases of knowledge from falsehood and Gettier cases where the subject relies on reasoning from falsehood. Second, the closeness-to-the-truth approach to explaining the difference between knowledge-yielding and knowledge-suppressing falsehoods does not hold up to scrutiny.

The paper proposes a novel account of justified evidence resistance. When S inquires as to whether p is the case, S resists available counterevidence e if S either fails to countenance e or is insensitive to e’s probative force. S is justified in resisting available counterevidence e if and only if e is irrelevant.

Two common theses in contemporary epistemology are that ‘knowledge excludes luck’ and that knowledge depends on ‘purely epistemic’ factors. In this essay, I shall argue as follows: given some plausible assumptions, ‘anti-luck epistemology,’ which is committed to the fi rst thesis, implies the falsity of the second thesis. That is, I will argue that anti-luck epistemology leads to what has been called ‘pragmatic encroachment’ on knowledge. Anti-luck epistemologists hoping to resist encroachment must accept a controversial thesis about true belief or (...) a dubious claim about luck and value and interests. (shrink)

Deviant causal chain problems arise in many settings. The most famous instance of the problem is the Gettier problem, but the problem also arises in the philosophy of action and perception. Usually, attempts to tackle these problems try to solve them individually. This paper takes a different approach: I propose a general solution to the problem. I begin by providing a solution to the deviant causal chain problem for skillful performance, and I argue that the solution can be extended to (...) solve the Gettier problem and the deviant causal chain problems for perception and intentional action. As I develop my solution to these problems, I also compare it with other solutions to bring out the advantages of my approach. I then explain why the solution generalizes: my solution provides us with an analysis of disposition manifestation, which is the key to ruling out deviance. I conclude by considering objections and giving my replies. (shrink)

First, ‘Is Justified True Belief Knowledge’ is imprecise but Gettier is explicit that ‘know’ is analysed as the definiendum is ‘S knows that P’. Second, Gettier does not misrepresent as Plato’s definition as the expressions used are ‘Plato considers’ and ‘seems to accept’. Third, Gettier is not mistaken to apply Plato’s definition to propositions since propositional knowledge is a species of Plato’s definition. Fourth, for Plato true belief temporally precedes an account. ‘Jones owns a Ford’ is never a true opinion, (...) hence no account for it can be given. The counterexample is reconstructed with temporality built into it. Fifth, Gettier does not fail to establish the equivalence of ‘believe’, ‘accepts’ and ‘sure’ in the three versions as this is implicitly established in the shifts made in the paper. Sixth, ‘entails’ logically is used only when the entailing proposition is true, but in the counterexamples a false proposition is taken to imply a true one. ‘Entail’ is to be taken in the ordinary sense of implies. Seventh, in Case I, the implication is preserved with the proper representation: → [Gy ↔ ], which implies { → [Gy ↔ ]}’. Eighth, the counterexample is reworked to avoid the objection that justification for p and justification for q may not be sufficient justification for ‘p & q’. (shrink)

The Cognitive Reflection Test is purported to test our inclination to overcome impulsive, intuitive thought with effortful, rational reflection. Research suggests that philosophers tend to perform better on this test than non-philosophers, and that men tend to perform better than women. Taken together, these findings could be interpreted as partially explaining the gender gap that exists in Philosophy: there are fewer women in Philosophy because women are less likely to possess the ideal ‘philosophical personality’. If this explanation for the gender (...) gap in Philosophy is accepted, it might be seen to exonerate Philosophy departments of the need to put in place much-needed strategies for promoting gender diversity. This paper discusses a number of reasons for thinking that this would be the wrong conclusion to draw from the research. Firstly, the CRT may not track what it is claimed it tracks. Secondly, the trait tracked by the CRT may not be something that we should value in philosophers. Thirdly, even if we accept that the CRT tracks a trait that has value, this trait might be of limited importance to good philosophising. Lastly, the causal story linking the gender gap in CRT score and the gender gap in Philosophy is likely to be far more complex than this explanation implies. (shrink)

According to the safety account of knowledge, one knows that p only if one’s belief could not easily have been false. An important issue for the account is whether we should only examine the target belief when evaluating whether a belief is safe or not. In this paper, it is argued that, if we should only examine the target belief, then the account fails to account for ignorance of necessary truths. But, if we should also examine beliefs in other relevant (...) propositions, then the account fails to account for knowledge from falsehood. Therefore, the safety account of knowledge is undermined by knowledge from falsehood and ignorance of necessary truths. (shrink)

The paper aims to unfold the «internal» content of Gettier’s argument as a skeptical argument against knowledge in terms of answering the question: «why he could be right when he says what he says». Our initial hypothesis is that E. Gettier does not say anything about the «accidentality of the fact that Smith has 10 coins in his pocket», but he uses the words «entailment» and «deduction», which substantiates the «truth of the conclusion», and on the basis of which he (...) attributes «knowledge» to Smith. The article comes out at a certain time, E. Gettier uses the rhetoric of necessary and sufficient conditions, with regard to justification an analogue of the closure principle is given, there are exactly two examples – all this lead to the assumption that E. Gettier’s «justification» in the form he speaks about it in the staging part of the article – is a logical relationship between beliefs that are interconnected by the relationship of entailment and are fixed in the same way in the person’s belief system. Much of the evidence on pages two and three is an illustration of why this «logical interpretation» of reasoning doesn’t work. Contrary to most popular points of view, E. Gettier managed to show only that the implementation of formal relations between beliefs does not allow one to get to «knowledge» in the form in which he defines it. In particular, such a reading makes it possible to block various attempts to propose a «fourth condition». It must meet the task set – to restore confidence that the fulfillment of the formal relations between beliefs can help to get to «knowledge». However, within the framework of the linguistic turn paradigm, in which E. Gettier works, this is impossible, because in general, it simply lacks adequate means of discussing the persuasiveness of the inference. In this sense, «knowledge» is, by definition, a fuzzy concept that brings us back to «classical notions» in which the persuasiveness of an argument implies not only validity, but also soundness, relevance, and usefulness. (shrink)

The paper analyzes the problem of interpretations of the Gettier problem. The author draws a distinction between counterexamples presented in Edmund Gettier’s article and Gettier-style cases, between the Gettier problem and general epistemological problem supposedly occurring in all or many Gettier-style cases. It is argued that in Gettier’s article there is a gap associated with an insufficiently defined concept of justification, which does not allow talking about Gettier problem without any explicit or implicit interpretation of his views on justification. Along (...) with this, it is indicated that the same concept of justification has strict features (deductive closure principle, non-factive justification and internalism), which do not allow arbitrary interpretations of the Gettier problem, and therefore we can say that some interpretations are closer to the text of a well-known article. (shrink)

In a Normal Case, a subject has a justified true belief that P and also knows that P. In a Gettier Case, a subject has a justified true belief that P but does not know that P. The received view (endorsed by Lycan and others) is that if one is in a Normal Case then one cannot know that he is not in a Gettier case. I argue that the received view is mistaken and I discuss the implications this has (...) on some other epistemological issues. (shrink)

Many meta-ethicists have thought that rationality requires us to heed apparent normative reasons, not objective normative reasons. But what are apparent reasons? There are two kinds of standard answers. On de dicto views, R is an apparent reason for S to \ when it appears to S that R is an objective reason to \ . On de re views, R is an apparent reason for S to \ when R’s truth would constitute an objective reason for S to \ (...) , and it appears to S that R. De re views are currently more popular because they avoid overintellectualizing rationality. But they face problems owing to the way in which they do so. Some assume that we can escape these problems by requiring more information to be apparent or by appealing to defeat. But these strategies fail. So, I defend a new view: apparent reasons are apparent facts that agents are competently attracted to treat like objective reasons, where competence is indirectly defined in terms of objective reasons and a competence/performance distinction is honored. Since one can treat X like an F without having the concept of an F, the view does not overintellectualize rationality. But it is also strong enough to dodge the pitfalls of de re views. (shrink)

Nagel, San Juan, and Mar report an experiment investigating lay attributions of knowledge, belief, and justification. They suggest that, in keeping with the expectations of philosophers, but contra recent empirical findings [Starmans, C. & Friedman, O. (2012). The folk conception of knowledge. Cognition, 124, 272–283], laypeople consistently deny knowledge in Gettier cases, regardless of whether the beliefs are based on ‘apparent’ or ‘authentic’ evidence. In this reply, we point out that Nagel et al. employed a questioning method that biased participants (...) to deny knowledge. Moreover, careful examination of participants’ responses reveals that they attributed knowledge in Gettier cases. We also note that Nagel et al. misconstrue the distinction between ‘apparent’ and ‘authentic’ evidence, and use scenarios that do not feature the structure that characterizes most Gettier cases. We conclude that NS&M’s findings are fully compatible with the claim that laypeople attribute knowledge in Gettier cases in general, but are significantly less likely to attribute knowledge when a belief is generated based on apparent evidence. (shrink)

What do you get when you cross a fallacy with a good argument? A fugu, that is, a valid argument that tempts you to reach its conclusion invalidly. You have yielded to the temptation more than you realize. If you are a teacher, you may have served many fugus. They arise systematically through several mechanisms. Fugus are interesting intermediate cases that shed light on the following issues: bare evidentialism, false pleasure, philosophy of education, and the ethics of argument. Normally, a (...) fugu will not yield knowledge from known premises. But if the reasoning is only slightly fallacious, they do yield knowledge. These mild fugus show that we can gain knowledge by invalid reasoning. This is a conservative resource for historians. They want to credit discoveries to Euclid rather than those who made minor corrections to his proofs, such as David Hilbert. We also benefit from this practice of grandfathering in old standards of knowledge attribution. For we can compete spiritedly for priority. We do not need to worry that credit will instead go to future scholars who will make the minor amendments needed to raise present proofs to a future standard of demonstration. (shrink)

We propose a new topological semantics for evidence, evidence-based justifications, belief, and knowledge. Resting on the assumption that an agent’s rational belief is based on the available evidence, we try to unveil the concrete relationship between an agent’s evidence, belief, and knowledge via a rich formal framework afforded by topologically interpreted modal logics. We prove soundness, completeness, decidability, and the finite model property for the associated logics, and apply this setting to analyze key epistemological issues such as “no false lemma” (...) Gettier examples, misleading defeaters, undefeated justification versus undefeated belief, as well as the defeasibility theories of knowledge. (shrink)

This paper challenges a recent argument of Bird’s, which involves imagining that Réné Blondlot’s belief in N-rays was true, in favour of the view that scientific progress should be understood in terms of knowledge rather than truth. By considering several variants of Bird’s thought-experiment, it shows that the semantic account of progress cannot be so easily vanquished. A key possibility is that justification is only instrumental in, and not partly constitutive of, progress.

The growing literature on philosophical thought experiments has so far focused almost exclusively on the role of thought experiments in confirming or refuting philosophical hypotheses or theories. In this paper we draw attention to an additional and largely ignored role that thought experiments frequently play in our philosophical practice: some thought experiments do not merely serve as means for testing various philosophical hypotheses or theories, but also serve as facilitators for conceiving and articulating new ones. As we will put it, (...) they serve as ‘heuristics for theory discovery’. Our purpose in the paper is two-fold: to make a case that this additional role of thought experiments deserves the attention of philosophers interested in the methodology of philosophy; to sketch a tentative taxonomy of a number of distinct ways in which philosophical thought experiments can aid theory discovery, which can guide future research on this role of thought experiments. (shrink)

I will discuss a variety of cases such that the subject's believing truly is somewhat of an accident, but less so than in a Gettier case. In each case, this is because her reasons are not ultimately undefeated full stop, but they are ultimately undefeated with certain qualifications. For example, the subject's reasons might be ultimately defeated considered in themselves but ultimately undefeated considered as a proper part of an inference to the best explanation that is undefeated without qualification. In (...) each section of the paper, I consider different qualifications and show how in each case we get an epistemic standing I call “coach-class knowledge”. First-class knowledge requires justifying reasons that are undefeated without qualification. Coach-class knowledge only requires qualified lack of defeat. I will use this distinction to bring debates over knowledge from falsehood and fake barns to an ecumenical resolution. In both cases, the subject enjoys coach-class rather than first-class knowledge. I will also show that the defeasible reasoning tradition can better account for graded accidental truth than safety theories. (shrink)

Mathematicians do not claim to know a proposition unless they think they possess a proof of it. For all their confidence in the truth of a proposition with weighty non-deductive support, they maintain that, strictly speaking, the proposition remains unknown until such time as someone has proved it. This article challenges this conception of knowledge, which is quasi-universal within mathematics. We present four arguments to the effect that non-deductive evidence can yield knowledge of a mathematical proposition. We also show that (...) some of what mathematicians take to be deductive knowledge is in fact non-deductive. 1 Introduction2 Why It Might Matter3 Two Further Examples and Preliminaries4 An Exclusive Epistemic Virtue of Proof?5 Analyses of Knowledge6 The Inductive Basis of Deduction7 Physical to Mathematical Linkages8 Conclusion. (shrink)

The principle of Counter-Closure embodies the widespread view that when a proposition is believed solely as the conclusion of single-premise deduction, it can be known only if the premise is also known. I raise a problem for the compatibility of Jason Stanley's Interest-Relative Invariantism (IRI) with Counter-Closure. I explore the landscape of options that might help Stanley resolve this tension and argue that a trilemma confronts Stanley: he must either (i) renounce a key intuition that lies at the foundation of (...) his view; or (ii) admit into his epistemology an IRI-specific novel brand of Gettier case; or (iii) abandon Counter-Closure. (shrink)

Antognazza (“The Benefit to Philosophy”, “The Distinction in Kind”), Dutant (“The Legend”), and I (“Knowledge Before Gettier”) have argued for the historical falsity of the claim that, prior to Gettier’s famous counterexamples of sixty years ago, the so-called ‘traditional’ conception of knowledge was the justified true belief (JTB) conception. This note addresses a related historical question that, rather surprisingly, has not yet been addressed in the philosophical literature; to wit: when did this claim first appear in this literature?

A large portion of our knowledge seems to rest on our memories, while memory scepticism poses challenges to our memory knowledge. This paper will delve into different forms of memory scepticism. The goal of this paper is twofold: First, drawing on Moon (2017) and Frise (2022), I compare and criticize various forms of sceptical arguments provided by them. Meanwhile, the two most threatening arguments are picked out: the Russellian argument and the argument from doubtful reliability. Second, I demonstrate that the (...) two arguments are essentially based on the closure principle and the underdetermination principle, respectively, and hence, Pritchard’s biscopic anti-sceptical proposal is applicable. A Pritchardean solution to the problem of memory scepticism will then be sketched out. (shrink)

This paper argues for two interrelated claims. The first is that the most innovative contribution of Timothy Williamson, Herman Cappelen, and Max Deutsch in the debate about the epistemology of thought experiments is not the denial of intuition and the claim of the irrelevance of experimental philosophy but the claim of epistemological continuity and the rejection of philosophical exceptionalism. The second is that a better way of implementing the claim of epistemological continuity is not Deutsch and Cappelen’s argument view or (...) Williamson’s folk psychological view. This is so because while the argument view makes the basis of the relevant classificational judgement evidentially too demanding; the folk psychological view makes it too weak and error-prone to count as an adequate explanation. Drawing from a certain reading of Aristotle’s Nichomachean Ethics that flowers in Miranda Fricker and John McDowell, I argue for the reason-responsiveness view. Like the extant views, the reason-responsiveness view vindicates the claim of epistemological continuity. But unlike the extant views, it does not share those problematic features. Further, I show that the reason-responsiveness view offers a way for champions of the claim of epistemological continuity to resist Avner Baz’s objection to the claim of epistemological continuity and his objection to the philosophical use of thought experiments while taking on board some attractive elements of his view. (shrink)

Those in the Gricean tradition take it that successful human communication features an audience who not only arrives at the intended content of the signal, but also recognizes the speaker’s intention that they do so. Some in this tradition have also argued that there are yet further conditions on communicative success, which rule out the possibility of communicating by luck. Supposing that both intention-recognition and some sort of anti-luck condition are correctly included in an analysis of human communication, this article (...) asks what the value of events satisfying these conditions is. I present a puzzle concerning the value of intention-recognition which is analogous to the Meno Problem in epistemology, but ultimately argue that this puzzle is solveable: the signaling-relevant value of intention recognition can be vindicated. However, I argue that the version of this puzzle that concerns the further proposed luck-proofing conditions on communication can not be answered. I argue therefore that communication, as analyzed by many, is no more valuable qua signal than a proper subset of its conditions. Human communication is thennot a uniquely valuable signaling event. (shrink)

Seven proposed accounts of epistemic possibility are criticized, and a new account is proposed, making use of the notion of having justification for dismissing a proposition. The new account explains intuitions about otherwise puzzling cases, upholds plausible general principles about epistemic possibility, and explains the practical import of epistemic modality judgements. It is suggested that judgements about epistemic possibility function to assess which propositions are worthy of further inquiry.

In this paper, I survey some recent literature produced by the established Chinese philosophers who regularly publish in Chinese philosophy journals and work in Mainland China. Specifically, I review the recent research of these philosophers in two areas: Chinese Philosophy and epistemology. In each area, I focus on two topics that have caught the attention of a lot of Chinese philosophers. I argue that the Chinese philosophers’ research on these topics has two prevalent problems: (i) a lot of arguments they (...) make are weak; (ii) they tend not to critically engage with others. I discuss a metaphilosophical objection that weak argumentation and disengagement are not vices of philosophical research. I also try to make sense of (i) and (ii) in terms of some cultural factors. (shrink)

Experimental restrictionists have challenged philosophers’ reliance on intuitions about thought experiment cases based on experimental findings. According to the expertise defense, only the intuitions of philosophical experts count—yet the bulk of experimental philosophy consists in studies with lay people. In this paper, we argue that direct strategies for assessing the expertise defense are preferable to indirect strategies. A direct argument in support of the expertise defense would have to show: first, that there is a significant difference between expert and lay (...) intuitions; second, that expert intuitions are superior to lay intuitions; and third, that expert intuitions accord with the relevant philosophical consensus. At present, there is only little experimental evidence that bears on these issues. To advance the debate, we conducted two new experiments on intuitions about knowledge with experts and lay people. Our results suggest that the intuitions of epistemological experts are superior in some respects, but they also pose an unexpected challenge to the expertise defense. Most strikingly, we found that even epistemological experts tend to ascribe knowledge in fake-barn-style cases. This suggests that philosophy, as a discipline, might fail to adequately map the intuitions of its expert practitioners onto a disciplinary consensus. (shrink)

One of contemporary epistemology's more important conceptual challenges is that of understanding the nature of fallibility. Part of why this matters is that it would contribute to our understanding the natures of fallible warrant and fallible knowledge. This article evaluates two candidates – and describes a shared form of failing. Each is concealedly infallibilist. This failing is all-too-representative of the difficulty of doing justice to the notion of fallibility within the notions of fallible warrant and fallible knowledge. The article ends (...) with a proposal for an improved form of conception of fallible warrant and fallible knowledge. (shrink)

Beginning with Zagzebski (The Philosophical Quarterly 44:65–73, 1994), some philosophers have argued that there can be no solution to the Gettier counterexamples within the framework of a fallibilist theory of knowledge. If true, this would be devastating, since it is believed on good grounds that infallibilism leads to scepticism. But I argue here that these purported proofs are mistaken and that the truthmaker solution to the Gettier problems is both cogent and fallibilist in nature. To show this I develop the (...) notion of evidence of a state of affairs, a crucial concept in the truthmaker theory. I also argue that a common principle of the transmission of evidence through entailment is false, and the cause of much of the trouble. (shrink)

Edmund Gettier’s paper “Is Justified True Belief Knowledge?” first appeared in an issue of Analysis , dated June of 1963, and although it’s tempting to wax hyperbolic when discussing the paper’s importance and influence, it is fair to say that its impact on contemporary philosophy has been substantial and wide-ranging. Epistemology has benefited from 50 years of sincere and rigorous discussion of issues arising from the paper, and Gettier’s conclusion that knowledge is not justified true belief is sometimes offered as (...) an example of the reality of philosophical progress. However, what can be called the Gettier problem has little to do with the text of the famous paper itself. The importance of the Gettier problem does not depend on the attribution of the tripartite theory of knowledge to Plato, Chisholm, and Ayer, nor on the psychological plausibility of the par .. (shrink)

This article argues, against contemporary experimentalist criticism, that conceptual analysis has epistemic value, with a structure that encourages the development of interesting hypotheses which are of the right form to be valuable in diverse areas of philosophy. The article shows, by analysis of the Gettier programme, that conceptual analysis shares the proofs and refutations form Lakatos identified in mathematics. Upon discovery of a counterexample, this structure aids the search for a replacement hypothesis. The search is guided by heuristics. The heuristics (...) of conceptual analysis are similar to those in other interesting areas of scholarship, and so hypotheses generated by it are of the right form to be applicable to diverse areas. The article shows that the explanationist criterion in epistemology was developed and applied in this way. The epistemic value of conceptual analysis is oblique because it contributes not towards the main purpose of conceptual analysis but towards the reliable development of epistemically valuable hypotheses in philosophy and scholarship. (shrink)

Is knowledge definable as justified true belief? We argue that one can legitimately answer positively or negatively, depending on whether or not one’s true belief is justified by what we call adequate reasons. To facilitate our argument we introduce a simple propositional logic of reason-based belief, and give an axiomatic characterization of the notion of adequacy for reasons. We show that this logic is sufficiently flexible to accommodate various useful features, including quantification over reasons. We use our framework to contrast (...) two notions of JTB: one internalist, the other externalist. We argue that Gettier cases essentially challenge the internalist notion but not the externalist one. Our approach commits us to a form of infallibilism about knowledge, but it also leaves us with a puzzle, namely whether knowledge involves the possession of only adequate reasons, or leaves room for some inadequate reasons. We favor the latter position, which reflects a milder and more realistic version of infallibilism. (shrink)

Falsehood can preclude knowledge in many ways. A false proposition cannot be known. A false ground can prevent knowledge of a truth, or so we argue, but not every false ground deprives its subject of knowledge. A falsehood that is not a ground for belief can also prevent knowledge of a truth. This paper provides a systematic account of just when falsehood precludes knowledge, and hence when it does not. We present the paper as an approach to the Gettier problem (...) and arrive at a relatively simple theory with virtues linked to several issues at the heart of contemporary epistemology. (shrink)

Belief and credence are often characterized in three different ways—they ought to govern our actions, they ought to be governed by our evidence, and they ought to aim at the truth. If one of these roles is to be central, we need to explain why the others should be features of the same mental state rather than separate ones. If multiple roles are equally central, then this may cause problems for some traditional arguments about what belief and credence must be (...) like. I read the history of formal and traditional epistemology through the lens of these functional roles, and suggest that considerations from one literature might have a role in the other. The similarities and differences between these literatures may suggest some more general ideas about the nature of epistemology in abstraction from the details of credence and belief in particular. (shrink)

Ernest Sosa has made and continues to make major contributions to a wide variety of topics in epistemology. In this paper I discuss some of his core ideas about the nature of knowledge and scepticism. I start with a discussion of the safety account of knowledge – a view he has championed and further developed over the years. I continue with some questions concerning the role of the concept of an epistemic virtue for our understanding of knowledge. Safety and virtue (...) hang very closely together for Sosa. All this easily leads to some thoughts on epistemic scepticism and on Sosa's stance on this. (shrink)

This paper defends a simple, externalist account of knowledge, incorporating familiar conditions mentioned in the literature, and responds to Timothy Williamson’s charge that any such analysis is futile because knowledge is semantically un-analyzable. The response, in short, is that even though such an account may not offer a reductive analysis of knowledge-by way of more basic, non-circular concepts-it still has an explanatory advantage over Williamson’s own position: it explains how belief can fail to be knowledge.

Suprotno općeprihvaćenom mišljenju, argumentiram da Gettierovi protuprimjeri za trodijelnu analizu znanja kao opravdanoga istinitog vjerovanja nisu uspjeli zato što uvjet opravdanja, a pogotovo uvjet istinitosti za znanje u tim slučajevima nisu jednoznačno ispunjeni. Jer sudovi u koje se vjeruje jesu semantički ambivalentni te se za njih ne može jasno reći jesu ili istiniti ili neistiniti, pa stoga ni jesu li predmeti opravdanih istinitih vjerovanja. To je zbog zbunjujuće semantičke uloge koju igra odreðeni opis i ekskluzivna disjunkcija . Stoga nijedan od (...) Gettierovih navodnih protuprimjera zapravo ne opovrgava trodijelnu analizu kao takvu, nego samo jednu njezinu interpretaciju. Gettierovi se slučajevi mogu u najboljem slučaju protumačiti kao oni koji zahtijevaju modifikaciju i poboljšanje tradicionalne analize, a ne kao oni koji zahtijevaju njezino zamjenjivanje. Neki se drugi gettierovski slučajevi, npr. oni koje su iznijeli Lehrer i Feldman, mogu razmatrati na analogan način.Contrary to the received view, I argue that Gettier’s counterexamples to the tripartite analysis of knowledge as justified true belief failed, because the justification condition and especially truth condition for knowledge in these cases are not unambiguously fulfilled. For the propositions believed are semantically ambiguous and cannot be clearly said to be either true or false and, therefore, to be the objects of justified true beliefs. This is due to the puzzling semantic role played by a definite description and an exclusive disjunction . Therefore, neither of Gettier’s alleged counterexamples does in fact refute the tripartite analysis as such, but only an interpretation of it. Gettier’s cases can be at best construed as demanding a modification and improvement of the traditional analysis and not as demanding its replacement. Some other Gettier-like cases, e.g. those proposed by Lehrer and Feldman, can be treated in an analogous manner. (shrink)

Knowledge is central to epistemology. Indeed, the word ‘epistemology’ comes from the Greek word epistêmê, which is often translated as ‘knowledge.’ But what is knowledge? Why do we value it? How is it acquired? And how much of it do we have? This article explores the nature, significance, sources, and extent of human knowledge.

I argue that to know that a proposition is true one must have justification for being certain that the proposition is true. That is, one must have infallible epistemic justification for believing the proposition. It is widely accepted among epistemologists that we rarely, if ever, have such strong justification for our beliefs. It follows that there is precious little that we know. That conclusion is unacceptable to many philosophers. I argue that the positions that lead to the skeptical conclusion are (...) well-motivated and that the skeptical conclusion is implicitly accepted by ordinary speakers. My dissertation has three main components: a metaphilosophical position, an epistemological position, and an error theory. First, the metaphilosophical position. One very important part of philosophy is the analysis of our ordinary concepts. Analysis of our concepts begins with reflecting on what we are inclined to say about various actual and possible cases when considered under specific descriptions. This traditional method has recently come under attack, due in part to the rise of semantic externalism. I agree with externalists that if ‘meaning is reference’ then there is little reason to think reflecting on our concepts from the armchair will provide insight to the nature of the concepts we investigate. I defend a version of semantic internalism which grounds meaning in factors with which subjects are directly acquainted. That view supports the traditional methodology. Furthermore, as the goal of philosophical analysis is to accurately describe concepts of philosophical interest, the only kind of objection that could be decisive against a proposed analysis is that it does not correctly describe our concept. That opens the door to a skeptical analysis of knowledge. Second, the epistemological position. I argue that the unacceptability of sentences of the form “S knows that p but it is possible for S that not-p” is best explained by the hypothesis that our concept of knowledge requires having justification for being certain that what one believes is true. I offer as a criterion of justified certainty the idea that when one knows a proposition is true, one is in a position to decisively answer questions about one’s knowledge of that proposition. I survey a number of competing theories of knowledge and show that they allow for the possibility of knowledge when one fails my criterion of decisive answerability. Those views fail my criterion because according to those views there is nothing the subject is aware of that guarantees for the subject that the allegedly known proposition is true. On that basis, I contend that knowledge is direct awareness of the factors that constitute the truth of the proposition one believes. Third, the error theory. Of course, we rarely have direct awareness of the factors that constitute the truth of the propositions we believe. So, our knowledge attributions are generally false. Yet, they are overwhelmingly natural to make. I argue that competent speakers are often quick to recognize knowledge attributions as a kind of ‘loose talk’ akin to the way we loosely ascribe geometric properties to ordinary objects. We regularly call objects ‘square’ that are not even close to being square, and we are quick to recognize this when challenged. I argue that we do this because we are so accustomed to communicating using strict language to make false claims that we often do not attend to the literal falsity of what we are saying. While we accept very demanding standards for knowledge, the phenomenon of recognizing that our knowledge claims are regularly false is as pervasive as our use of loose speech. (shrink)

El artículo muestra la forma en que laepistemología de las virtudes puederesolver algunos de los problemasepistemológicos clásicos, y la manera enque puede lograrse una concepciónintegrada de las variantes confiabilistay responsabilista de la epistemología delas virtudesThis paper shows the way in which Virtue Epistemology can solve some ofthe classical epistemological problems,and the way in which an integrated approach of the Reliabilist and Responsibilist variants of Virtue Epistemology can be achieved.

In this article I propose a new problem for the classical analysis of knowledge (as justified true belief) and all analyses belonging to its legacy. The gist of my argument is that truth as a condition for a belief to be knowledge is problematic insofar there is no definition of truth. From this, and other remarks relating to the possibility of defining truth (or lack thereof) and about what truth theories fit our thoughts about knowledge, I conclude that as long (...) as truth is unquestioningly taken as a condition of knowing, knowledge can never be defined in a way that could satisfy our intuitions about it. (shrink)